/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:55:28,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:55:28,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:55:28,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:55:28,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:55:28,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:55:28,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:55:28,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:55:28,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:55:28,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:55:28,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:55:28,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:55:28,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:55:28,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:55:28,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:55:28,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:55:28,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:55:28,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:55:28,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:55:28,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:55:28,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:55:28,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:55:28,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:55:28,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:55:28,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:55:28,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:55:28,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:55:28,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:55:28,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:55:28,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:55:28,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:55:28,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:55:28,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:55:28,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:55:28,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:55:28,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:55:28,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:55:28,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:55:28,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:55:28,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:55:28,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:55:28,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:55:28,625 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:55:28,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:55:28,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:55:28,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:55:28,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:55:28,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:55:28,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:55:28,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:55:28,627 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:55:28,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:55:28,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:55:28,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:55:28,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:55:28,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:55:28,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:55:28,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:55:28,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:55:28,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:55:28,632 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:55:28,633 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:55:28,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:55:28,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:55:28,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:55:28,874 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:55:28,874 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:55:28,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2023-04-02 01:55:30,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:55:30,186 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:55:30,186 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2023-04-02 01:55:30,191 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366952fb5/2bd9c019b95d418894826dd2e78adbc5/FLAG38e11c0e2 [2023-04-02 01:55:30,201 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366952fb5/2bd9c019b95d418894826dd2e78adbc5 [2023-04-02 01:55:30,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:55:30,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:55:30,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:55:30,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:55:30,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:55:30,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c8751b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30, skipping insertion in model container [2023-04-02 01:55:30,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:55:30,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:55:30,335 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2023-04-02 01:55:30,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:55:30,366 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:55:30,378 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2023-04-02 01:55:30,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:55:30,404 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:55:30,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30 WrapperNode [2023-04-02 01:55:30,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:55:30,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:55:30,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:55:30,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:55:30,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,426 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:55:30,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:55:30,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:55:30,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:55:30,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (1/1) ... [2023-04-02 01:55:30,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:55:30,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:30,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:55:30,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:55:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:55:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:55:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:55:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:55:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:55:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:55:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:55:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:55:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:55:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:55:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 01:55:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:55:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:55:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:55:30,567 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:55:30,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:55:30,861 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:55:30,866 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:55:30,867 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:55:30,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:55:30 BoogieIcfgContainer [2023-04-02 01:55:30,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:55:30,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:55:30,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:55:30,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:55:30,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:55:30" (1/3) ... [2023-04-02 01:55:30,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ca9594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:55:30, skipping insertion in model container [2023-04-02 01:55:30,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:55:30" (2/3) ... [2023-04-02 01:55:30,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ca9594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:55:30, skipping insertion in model container [2023-04-02 01:55:30,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:55:30" (3/3) ... [2023-04-02 01:55:30,875 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2023-04-02 01:55:30,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:55:30,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:55:30,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:55:30,947 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3055e897, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:55:30,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:55:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 01:55:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:55:30,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:30,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:30,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:30,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2024343623, now seen corresponding path program 1 times [2023-04-02 01:55:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:30,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960003226] [2023-04-02 01:55:30,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:31,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960003226] [2023-04-02 01:55:31,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 01:55:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201379886] [2023-04-02 01:55:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:31,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:55:31,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:55:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:31,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 01:55:31,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:55:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:31,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:55:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201379886] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:55:31,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:55:31,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 01:55:31,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954024479] [2023-04-02 01:55:31,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:55:31,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 01:55:31,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 01:55:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 01:55:31,253 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:55:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:31,278 INFO L93 Difference]: Finished difference Result 69 states and 109 transitions. [2023-04-02 01:55:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 01:55:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 01:55:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:31,286 INFO L225 Difference]: With dead ends: 69 [2023-04-02 01:55:31,286 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 01:55:31,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 01:55:31,295 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:31,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:55:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 01:55:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 01:55:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 01:55:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-04-02 01:55:31,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2023-04-02 01:55:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:31,329 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-04-02 01:55:31,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:55:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-04-02 01:55:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 01:55:31,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:31,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:31,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:55:31,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 01:55:31,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:31,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash -96361696, now seen corresponding path program 1 times [2023-04-02 01:55:31,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:31,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814677609] [2023-04-02 01:55:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:31,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:55:31,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707208489] [2023-04-02 01:55:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:31,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:31,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:31,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:55:31,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:55:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:31,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:55:31,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:55:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:31,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:55:31,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:31,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814677609] [2023-04-02 01:55:31,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:55:31,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707208489] [2023-04-02 01:55:31,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707208489] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:55:31,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:55:31,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:55:31,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192163812] [2023-04-02 01:55:31,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:55:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:55:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:55:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:55:31,682 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:55:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:31,703 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2023-04-02 01:55:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:55:31,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-02 01:55:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:31,705 INFO L225 Difference]: With dead ends: 55 [2023-04-02 01:55:31,705 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 01:55:31,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:55:31,706 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:31,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:55:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 01:55:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-02 01:55:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 01:55:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-04-02 01:55:31,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2023-04-02 01:55:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:31,715 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-04-02 01:55:31,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:55:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-04-02 01:55:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 01:55:31,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:31,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:31,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:55:31,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 01:55:31,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:31,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:31,921 INFO L85 PathProgramCache]: Analyzing trace with hash 962099791, now seen corresponding path program 1 times [2023-04-02 01:55:31,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:31,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868778316] [2023-04-02 01:55:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:31,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:31,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:55:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361437675] [2023-04-02 01:55:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:31,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:31,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:31,953 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:55:31,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:55:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:32,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:55:32,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:55:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:32,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:55:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:32,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868778316] [2023-04-02 01:55:32,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:55:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361437675] [2023-04-02 01:55:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361437675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:55:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:55:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:55:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767947417] [2023-04-02 01:55:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:55:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:55:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:55:32,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:55:32,084 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:55:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:32,116 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-04-02 01:55:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:55:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-02 01:55:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:32,119 INFO L225 Difference]: With dead ends: 49 [2023-04-02 01:55:32,119 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 01:55:32,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:55:32,120 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:32,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 149 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:55:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 01:55:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-04-02 01:55:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 01:55:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2023-04-02 01:55:32,128 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2023-04-02 01:55:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:32,128 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2023-04-02 01:55:32,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:55:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2023-04-02 01:55:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 01:55:32,129 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:32,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:32,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:55:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:32,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:32,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 963589341, now seen corresponding path program 1 times [2023-04-02 01:55:32,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:32,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91393673] [2023-04-02 01:55:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:55:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:32,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:55:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91393673] [2023-04-02 01:55:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91393673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:55:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:55:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 01:55:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988135351] [2023-04-02 01:55:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:55:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 01:55:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 01:55:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 01:55:32,837 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:55:35,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:40,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:42,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:43,517 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2023-04-02 01:55:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:55:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-02 01:55:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:43,518 INFO L225 Difference]: With dead ends: 72 [2023-04-02 01:55:43,519 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 01:55:43,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:55:43,521 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:43,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 212 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2023-04-02 01:55:43,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 01:55:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 01:55:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 01:55:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-04-02 01:55:43,538 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2023-04-02 01:55:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:43,538 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-04-02 01:55:43,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:55:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-04-02 01:55:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:55:43,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:43,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:43,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 01:55:43,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:43,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1701877900, now seen corresponding path program 1 times [2023-04-02 01:55:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:43,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119565500] [2023-04-02 01:55:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:43,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:43,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:55:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430582111] [2023-04-02 01:55:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:43,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:43,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:55:43,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:55:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:43,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 01:55:43,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:55:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:43,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:55:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:43,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119565500] [2023-04-02 01:55:43,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:55:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430582111] [2023-04-02 01:55:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430582111] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:55:43,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:55:43,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 01:55:43,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814706611] [2023-04-02 01:55:43,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:55:43,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:55:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:55:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:55:43,729 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:55:46,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:50,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:55:52,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:55:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:55:53,037 INFO L93 Difference]: Finished difference Result 104 states and 146 transitions. [2023-04-02 01:55:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:55:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-04-02 01:55:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:55:53,039 INFO L225 Difference]: With dead ends: 104 [2023-04-02 01:55:53,039 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 01:55:53,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:55:53,040 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:55:53,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 211 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2023-04-02 01:55:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 01:55:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2023-04-02 01:55:53,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 01:55:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2023-04-02 01:55:53,054 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2023-04-02 01:55:53,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:55:53,054 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2023-04-02 01:55:53,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:55:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2023-04-02 01:55:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 01:55:53,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:55:53,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:55:53,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:55:53,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:53,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:55:53,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:55:53,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1564262277, now seen corresponding path program 1 times [2023-04-02 01:55:53,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:55:53,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982981678] [2023-04-02 01:55:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:55:53,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:55:53,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36499079] [2023-04-02 01:55:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:55:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:55:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:55:53,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:55:53,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:55:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:55:53,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 01:55:53,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:55:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:53,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:55:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:55:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:55:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982981678] [2023-04-02 01:55:53,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:55:53,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36499079] [2023-04-02 01:55:53,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36499079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:55:53,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:55:53,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-02 01:55:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110426808] [2023-04-02 01:55:53,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:55:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:55:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:55:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:55:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:55:53,429 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:55:55,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:00,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:02,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:56:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:56:03,580 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2023-04-02 01:56:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 01:56:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-02 01:56:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:56:03,582 INFO L225 Difference]: With dead ends: 138 [2023-04-02 01:56:03,582 INFO L226 Difference]: Without dead ends: 129 [2023-04-02 01:56:03,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:56:03,583 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 125 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:56:03,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 199 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2023-04-02 01:56:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-02 01:56:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2023-04-02 01:56:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 70 states have internal predecessors, (87), 46 states have call successors, (46), 9 states have call predecessors, (46), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-04-02 01:56:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2023-04-02 01:56:03,603 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 24 [2023-04-02 01:56:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:56:03,603 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2023-04-02 01:56:03,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 01:56:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2023-04-02 01:56:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 01:56:03,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:56:03,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:56:03,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:56:03,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:56:03,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:56:03,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:56:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1562772727, now seen corresponding path program 1 times [2023-04-02 01:56:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:56:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463572661] [2023-04-02 01:56:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:56:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:56:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:56:04,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:56:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:56:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:56:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:56:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:56:04,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:56:04,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463572661] [2023-04-02 01:56:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463572661] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:56:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814246585] [2023-04-02 01:56:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:56:04,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:56:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:56:04,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:56:04,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:56:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:56:04,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 01:56:04,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:56:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:56:04,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:56:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:56:04,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814246585] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:56:04,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:56:04,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-04-02 01:56:04,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007160889] [2023-04-02 01:56:04,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:56:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:56:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:56:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:56:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:56:04,333 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:56:13,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:16,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:56:18,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:56:20,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:56:24,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:56:24,042 INFO L93 Difference]: Finished difference Result 258 states and 391 transitions. [2023-04-02 01:56:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:56:24,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-04-02 01:56:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:56:24,045 INFO L225 Difference]: With dead ends: 258 [2023-04-02 01:56:24,045 INFO L226 Difference]: Without dead ends: 200 [2023-04-02 01:56:24,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:56:24,048 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 161 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:56:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 161 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 547 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2023-04-02 01:56:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-02 01:56:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 185. [2023-04-02 01:56:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 100 states have (on average 1.29) internal successors, (129), 109 states have internal predecessors, (129), 72 states have call successors, (72), 13 states have call predecessors, (72), 12 states have return successors, (64), 62 states have call predecessors, (64), 64 states have call successors, (64) [2023-04-02 01:56:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2023-04-02 01:56:24,081 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 24 [2023-04-02 01:56:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:56:24,082 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2023-04-02 01:56:24,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:56:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2023-04-02 01:56:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 01:56:24,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:56:24,083 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:56:24,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 01:56:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:56:24,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:56:24,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:56:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -45171523, now seen corresponding path program 1 times [2023-04-02 01:56:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:56:24,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202285383] [2023-04-02 01:56:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:56:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:56:24,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:56:24,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175424194] [2023-04-02 01:56:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:56:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:56:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:56:24,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:56:24,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:56:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:56:24,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 01:56:24,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:56:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:56:24,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:56:37,706 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int) (main_~q~0 Int) (main_~r~0 Int)) (or (= (mod (+ (* main_~q~0 main_~q~0 4294967295 c_main_~h~0) (* 4294967292 main_~q~0 main_~q~0 c_main_~p~0) (* main_~q~0 main_~r~0 12 c_main_~h~0) (* main_~q~0 main_~n~0 4294967284 c_main_~h~0) (* c_main_~h~0 c_main_~h~0 c_main_~h~0) (* main_~q~0 main_~r~0 c_main_~p~0 4294967280) (* main_~q~0 main_~n~0 16 c_main_~p~0)) 4294967296) 0) (not (= (mod (+ (* main_~q~0 main_~r~0) (* c_main_~p~0 c_main_~p~0)) 4294967296) (mod (* main_~q~0 main_~n~0) 4294967296))))) is different from false [2023-04-02 01:56:37,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:56:37,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202285383] [2023-04-02 01:56:37,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:56:37,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175424194] [2023-04-02 01:56:37,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175424194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:56:37,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:56:37,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-04-02 01:56:37,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125862338] [2023-04-02 01:56:37,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:56:37,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:56:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:56:37,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:56:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2023-04-02 01:56:37,873 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:56:39,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:44,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:46,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:48,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:50,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:53,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:55,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:56:57,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:00,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:02,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:04,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:06,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:08,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:10,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:57:12,250 INFO L93 Difference]: Finished difference Result 240 states and 328 transitions. [2023-04-02 01:57:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 01:57:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-04-02 01:57:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:57:12,253 INFO L225 Difference]: With dead ends: 240 [2023-04-02 01:57:12,253 INFO L226 Difference]: Without dead ends: 212 [2023-04-02 01:57:12,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=37, Invalid=97, Unknown=2, NotChecked=20, Total=156 [2023-04-02 01:57:12,254 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:57:12,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 138 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 13 Unknown, 0 Unchecked, 32.3s Time] [2023-04-02 01:57:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-04-02 01:57:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2023-04-02 01:57:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 118 states have internal predecessors, (133), 76 states have call successors, (76), 18 states have call predecessors, (76), 17 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2023-04-02 01:57:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 278 transitions. [2023-04-02 01:57:12,287 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 278 transitions. Word has length 31 [2023-04-02 01:57:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:57:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 278 transitions. [2023-04-02 01:57:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 01:57:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 278 transitions. [2023-04-02 01:57:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 01:57:12,288 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:57:12,289 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:57:12,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 01:57:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:57:12,494 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:57:12,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:57:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash 821435566, now seen corresponding path program 1 times [2023-04-02 01:57:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:57:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667868750] [2023-04-02 01:57:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:57:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:57:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:12,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:57:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:12,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:57:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:57:12,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:57:12,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667868750] [2023-04-02 01:57:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667868750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:57:12,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821147995] [2023-04-02 01:57:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:57:12,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:57:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:57:12,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:57:12,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:57:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:12,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:57:12,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:57:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:57:12,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:57:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:57:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821147995] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:57:12,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:57:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-04-02 01:57:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194911996] [2023-04-02 01:57:12,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:57:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 01:57:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:57:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 01:57:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-02 01:57:12,861 INFO L87 Difference]: Start difference. First operand 205 states and 278 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 01:57:17,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:20,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:22,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:24,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:26,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:28,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:32,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:34,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:36,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:38,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:40,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:42,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:45,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:47,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:49,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:51,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:57:53,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:55,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:58,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:57:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:57:58,733 INFO L93 Difference]: Finished difference Result 480 states and 670 transitions. [2023-04-02 01:57:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 01:57:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2023-04-02 01:57:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:57:58,736 INFO L225 Difference]: With dead ends: 480 [2023-04-02 01:57:58,736 INFO L226 Difference]: Without dead ends: 429 [2023-04-02 01:57:58,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2023-04-02 01:57:58,738 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 203 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 115 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:57:58,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 170 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 333 Invalid, 18 Unknown, 0 Unchecked, 45.6s Time] [2023-04-02 01:57:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2023-04-02 01:57:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 405. [2023-04-02 01:57:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 210 states have (on average 1.2428571428571429) internal successors, (261), 226 states have internal predecessors, (261), 162 states have call successors, (162), 33 states have call predecessors, (162), 32 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2023-04-02 01:57:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 570 transitions. [2023-04-02 01:57:58,813 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 570 transitions. Word has length 32 [2023-04-02 01:57:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:57:58,814 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 570 transitions. [2023-04-02 01:57:58,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 01:57:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 570 transitions. [2023-04-02 01:57:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:57:58,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:57:58,821 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:57:58,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 01:57:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-02 01:57:59,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:57:59,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:57:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash -271152338, now seen corresponding path program 2 times [2023-04-02 01:57:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:57:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571040846] [2023-04-02 01:57:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:57:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:57:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:57:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-04-02 01:57:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:57:59,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:57:59,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571040846] [2023-04-02 01:57:59,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571040846] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:57:59,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751549711] [2023-04-02 01:57:59,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:57:59,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:57:59,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:57:59,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:57:59,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 01:57:59,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-02 01:57:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:57:59,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 01:57:59,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:57:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-02 01:57:59,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:57:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751549711] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:57:59,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:57:59,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2023-04-02 01:57:59,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539389462] [2023-04-02 01:57:59,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:57:59,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:57:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:57:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:57:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:57:59,469 INFO L87 Difference]: Start difference. First operand 405 states and 570 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:57:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:57:59,533 INFO L93 Difference]: Finished difference Result 453 states and 639 transitions. [2023-04-02 01:57:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:57:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2023-04-02 01:57:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:57:59,537 INFO L225 Difference]: With dead ends: 453 [2023-04-02 01:57:59,537 INFO L226 Difference]: Without dead ends: 402 [2023-04-02 01:57:59,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-04-02 01:57:59,538 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:57:59,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:57:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-04-02 01:57:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 202. [2023-04-02 01:57:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 115 states have internal predecessors, (130), 75 states have call successors, (75), 18 states have call predecessors, (75), 17 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-04-02 01:57:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 273 transitions. [2023-04-02 01:57:59,573 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 273 transitions. Word has length 50 [2023-04-02 01:57:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:57:59,574 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 273 transitions. [2023-04-02 01:57:59,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:57:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 273 transitions. [2023-04-02 01:57:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 01:57:59,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:57:59,575 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:57:59,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 01:57:59,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 01:57:59,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:57:59,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:57:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash 109392637, now seen corresponding path program 1 times [2023-04-02 01:57:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:57:59,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575346474] [2023-04-02 01:57:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:57:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:57:59,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:57:59,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31478787] [2023-04-02 01:57:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:57:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:57:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:57:59,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:57:59,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 01:57:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:57:59,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 01:57:59,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:58:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 01:58:00,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:58:12,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:58:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575346474] [2023-04-02 01:58:12,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:58:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31478787] [2023-04-02 01:58:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31478787] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:58:12,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 01:58:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 01:58:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027501843] [2023-04-02 01:58:12,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 01:58:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 01:58:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:58:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 01:58:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=221, Unknown=1, NotChecked=0, Total=272 [2023-04-02 01:58:12,026 INFO L87 Difference]: Start difference. First operand 202 states and 273 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 01:58:18,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:58:21,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:58:23,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:58:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:58:25,269 INFO L93 Difference]: Finished difference Result 252 states and 342 transitions. [2023-04-02 01:58:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 01:58:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 58 [2023-04-02 01:58:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:58:25,272 INFO L225 Difference]: With dead ends: 252 [2023-04-02 01:58:25,273 INFO L226 Difference]: Without dead ends: 195 [2023-04-02 01:58:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2023-04-02 01:58:25,274 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:58:25,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 235 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 408 Invalid, 2 Unknown, 0 Unchecked, 13.2s Time] [2023-04-02 01:58:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-04-02 01:58:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-04-02 01:58:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 113 states have internal predecessors, (126), 68 states have call successors, (68), 19 states have call predecessors, (68), 18 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-04-02 01:58:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 256 transitions. [2023-04-02 01:58:25,305 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 256 transitions. Word has length 58 [2023-04-02 01:58:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:58:25,306 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 256 transitions. [2023-04-02 01:58:25,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 01:58:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 256 transitions. [2023-04-02 01:58:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 01:58:25,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:58:25,308 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:58:25,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 01:58:25,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 01:58:25,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:58:25,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:58:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1229907887, now seen corresponding path program 2 times [2023-04-02 01:58:25,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:58:25,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168494059] [2023-04-02 01:58:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:58:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:58:25,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:58:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240558615] [2023-04-02 01:58:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:58:25,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:58:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:58:25,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:58:25,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 01:58:25,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:58:25,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:58:25,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 01:58:25,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:58:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 01:58:26,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:59:13,312 WARN L223 SmtUtils]: Spent 7.78s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:59:57,182 WARN L223 SmtUtils]: Spent 10.39s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)